[anipoke/spoilers] I saw Lillie's return episode which wraps up her storyline with her dad and I'm going to advise everyone even REMOTELY curious about how the anime handled Mohn's story, please watch it!
It is a BEAUTIFUL and emotional episode and it even took that old fandom theory (which I also liked!!) about Lillie being a Utsuroid/Nihilego and did something very unique and tragic with it...
I really like the anime's version of amnesiac Mohn, he looks so disheveled and his hair and beard are overgrown and messy, because Utsuroid hid his Aether clothes and all the mirrors to keep him from seeing his reflection and remembering.
An Utsuroid saved him from the Ultra Hole he fell through, but took him to Galar accidentally when trying to get him back to his world. She lived with him, pretending to be his daughter, all those years while he couldn't remember his family. ;_;
She didn't want his real family to take him away from her, but she also loved him and didn't want to throw out his things that could help him remember someday...
Lillie having grown and healed so much, she can actually hold an Utsuroid, after one traumatized her as a kid and left her unable to touch any Pokemon for years, and tell her to stay, accepting her as Lillie too... my heart. ;_;
She was going to just vanish and quietly slip away when he regained his memories and was with his family, feeling she no longer had any place, but Lillie caught her hand (well, tentacle)... "Stay, Lillie." ;_;
"Stay, Lillie." ;_;